LMR33630: Please help to review the invert buck with LMR33630ARNXR

Long Le

Part Number: LMR33630

Tool/software:

Hi TI supporter,

I'm designing the -5V circuit but don't know whether it work or not.
Can you please help to review my circuit?

Thank you so much.
Long Le Nguyen

4 months ago

0 Joshua Austria 4 months ago

TI__Mastermind 24115 points

Hi Long,

The one concern I see with the design is the inductor current rating. TI recommends that your inductor saturation current rating is at least as high as the high side switch current limit of the device to avoid significant saturation. In an inverting buck boost, the current stresses are more important to note. Please see section 4.2 in this application note that gives more details about this.

Thank you,

Joshua Austria

0 Long Le 4 months ago in reply to Joshua Austria

Prodigy 60 points

Thank you Joshua Austria

Regards,
Long Le Nguyen

0 Joshua Austria 4 months ago in reply to Long Le

TI__Mastermind 24115 points

Hi Long,

No problem!

Thank you,

Joshua Austria

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LMR33630: Please help to review the invert buck with LMR33630ARNXR